build/core/main.mk:45: ********************************************************************************build/core/main.mk:46: * You are using version 4.1 of make.build/core/main.mk:47: * Android can only be built by versions 3.81 and 3.82.build/core/main.mk:48: * see https://source.android.com/source/download.htmlbuild/core/main.mk:49: ********************************************************************************build/core/main.mk:50: *** stopping. Stop.

Android source code: android-4.4.3_r1

kernel source code: linux-2.6-imx

U-Boot imx checkout: KK4.4.3_2.0.0-ga

patch from: android_KK4.4.3_2.0.0-ga_core_source

What is the problem now. I followed the document for andridKK4.4.3_2.0.0